<template>
    <div>
              <!-- 面包屑导航区 -->
      <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区 -->
    <el-card>
        <!-- 提示区域 -->
         <el-alert
            title="添加商品信息"
            type="info"
            show-icon
             center
             :closable="false">
        </el-alert>
        <!-- 进度条 -->
        <el-steps :space="200" :active="activeIndex-0" 
        style="margin-top:30px;" align-center finish-status="success">
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
        </el-steps>
        <!-- tab切换页 -->
        <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
        <el-tabs v-model="activeIndex" :tab-position="'left'"
        :before-leave="beforeTabLeave"
        @tab-click ="tabClicked">
            <el-tab-pane label="基本信息" name="0">
                <el-form-item label="商品名称" prop="goods_name">
                    <el-input v-model="addForm.goods_name"></el-input>
                </el-form-item>
                <el-form-item label="商品价格" prop="goods_price" type="number">
                    <el-input v-model="addForm.goods_price"></el-input>
                </el-form-item>
                 <el-form-item label="商品重量" prop="goods_weight" type="number">
                    <el-input v-model="addForm.goods_weight"></el-input>
                </el-form-item>
                  <el-form-item label="商品数量" prop="goods_number" type="number">
                    <el-input v-model="addForm.goods_number"></el-input>
                </el-form-item>
                 <el-form-item label="商品分类" prop="goods_cat" type="number">
                    <el-cascader
                        v-model="addForm.goods_cat"
                        :options="catelist"
                        :props="cateProps"
                        @change="handleChange"></el-cascader>
                </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品参数" name="1">
                <!-- 渲染表单的item项 -->
                <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
                    <!-- 复选框组 -->
                     <el-checkbox-group v-model="item.attr_vals" border>
                         <el-checkbox :label="cb" v-for="(cb, i) in item.attr_vals" :key="i" border></el-checkbox>
                    </el-checkbox-group>
                </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品属性" name="2">
                <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                    <el-input v-model="item.attr_vals"></el-input>
                </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品图片" name="3">
                  <!-- action表示图片上传API -->
                <el-upload
            :action="uploadUrl"
            :on-preview="handlePreview"
            :on-remove="handleRemove"
            list-type="picture"
            :headers ="headerObj"
            :on-success="handleSuccess">
            <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
            </el-tab-pane>
            <el-tab-pane label="商品内容" name="4">
                <!-- 富文本编辑器组件 -->
                <quill-editor v-model ="addForm.goods_introduce" style="min-height=300px;"></quill-editor>
                <!-- 添加商品的按钮 -->
                <el-button type="primary" @click="addGoods">添加商品</el-button>
            </el-tab-pane>
        </el-tabs>
        </el-form>
    </el-card>
        <!-- 图片预览 -->
        <el-dialog
        title="图片预览"
        :visible.sync="previewVisible"
        width="50%">
        <img :src="previewPath" alt="" width="100%"/>
        </el-dialog>
    </div>
</template>
<script>
var _ = require('lodash');
export default {
    data(){
        return{
            activeIndex:0,
     // 添加商品的表单数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品所属的分类数组
        goods_cat: [],
        // 图片数组
        pics:[],
        // 商品的富文本
        goods_introduce:'',
        attrs:[]
      },
          addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      catelist:[],
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      // 动态参数面板
      manyTableData:[],
       // 静态属性面板数据
        onlyTableData:[],
     // 上传图片的地址
        uploadUrl:"http://127.0.0.1:8888/api/private/v1/upload",
     // 图片上传组件的headers请求头
        headerObj:{
            Authorization:window.sessionStorage.getItem('token')
        },
        //预览
        previewPath:'',
        // 预览对话框
        previewVisible:false
        }       
    },
    created(){
        this.getCateList()
    },
    methods:{
     async  getCateList(){
        const {data:res} = await this.$http.get('categories')
        console.log(res);
        if(res.meta.status !==200){
            return this.$message.error('获取商品分类数据失败！')
        }
        this.catelist = res.data
        console.log(this.catelist);
  
  } ,
  // 级联选择器触发后会显示
  handleChange(){
      console.log(this.addForm.goods_cat);
      if(this.addForm.goods_cat.length!== 3){
          this.addForm.goods_cat =[];
      }
  },
  beforeTabLeave(activeName,oldActiveName){
    //  console.log('即将离开的标签页名字是'+oldActiveName)
     // console.log('即将进入的标签页名字是'+activeName)
     if(oldActiveName ==='0' && this.addForm.goods_cat.length!==3){
        this.$message.error('请先选择商品分类！')
        return false;
     }
  },
async tabClicked(){
     // console.log(this.activeIndex);
     if(this.activeIndex ==='1'){
         console.log('获取动态参数面板')
 const{data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,
 {params:{sel:'many'}})
 if(res.meta.status !== 200){
     return this.$message.error('获取动态参数列表失败！')
 }
 console.log(res.data);
 res.data.forEach(item =>{
     item.attr_vals = item.attr_vals.length===0?[]:item.attr_vals.split('');
 })
 this.manyTableData = res.data;
     }else if(this.activeIndex ==='2'){
         const {data:res} = await this.$http.get(
             `categories/${this.cateId}/attributes`,{
                 params:{sel:'only'}
             }
         )
         if(res.meta.status !== 200){
             return this.$message.error('获取静态属性失败!')
         }
         console.log(res.data)
         this.onlyTableData = res.data;
     }

  },
  // 处理图片预览效果
  handlePreview(file){
      console.log(file);
      this.previewPath = 
      file.response.data.url;
      this.previewVisible = true;

  },
  // 处理移除图片的效果
  handleRemove(file){
      console.log(file);
      // 获得将要删除的临时路径
      const filePath = file.response.data.tmp_path;
      // 从pics数组中，找到这个图片的索引值
      const i = this.addForm.pics.findIndex(x=>
          x.pic === filePath)
    this.addForm.pics.splice(i,1)
    console.log(this.addForm);
  },
  // 监听图片上传成功的事件
  handleSuccess(response){
      console.log(response);
      const picInfo ={
          pic:response.data.tmp_path
      }
    // 拼接点到一个图片信息对象
    // 将图像信息对象 push到pics里面
    this.addForm.pics.push(picInfo)
    console.log(this.addForm);
  },
  // 添加商品
  addGoods(){
      console.log(this.addForm);
      this.$refs.addFormRef.validate( async valid=>{
          if(!valid){
              return this.$message.error('请填写必要的表单项')
          }
        //   执行添加的业务逻辑
     const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(' ')
       // 处理动态参数
        this.manyTableData.forEach(item =>{
            const newInfo ={
                attr_id: item.attr_id,
                attr_value:item.attr_vals.join(',')  }
                this.addForm.attrs.push(newInfo);
        })
       // 处理静态属性
       this.onlyTableData.forEach(item=>{
           const newInfo ={attr_id:item.attr_id,
           attr_value:item.attr_vals}
           this.addForm.attrs.push(newInfo);
       })
       form.attrs = this.addForm.attrs;
       console.log(form);
       // 发起请求添加商品
     const {data:res} = await this.$http.post('goods',form);
     console.log(res);
    //  if(res.meta.status !== 201){
    //      return this.$message.error('添加商品失败!');
    //  }
     this.$message.success('添加商品成功!')
     this.$router.push('/goods');
      })
  }
  
    },
    computed:{
        cateId(){
            if(this.addForm.goods_cat.length===3){
             return this.addForm.goods_cat[2]
            }
            return null;
        }
    }

}
</script>
<style scoped>
.el-checkbox{
    margin:0 5px 0 0 !important;
}
</style>